heart diagram,blood vessels and parts UPPER VENA CAVA AORTA (FROM HEAD & ARMS) PULMANARY ARTERY (TO LUNGS) PULMANARY ARTERY (TO LUNGS) LUNG LUNG PULMANARY VEIN (FROM LUNGS) PULMANARY VEIN (FROM LUNGS) LEFT ATRIUM RIGHT ATRIUM LEFT VENTRICLE RIGHT VENTRICLE LOWER VENA CAVA (FROM LOWER BODY) ARTERY TO LOWER BODY BODY heart diagram,blood vessels and parts Heart: circulates blood throughout the body "The Pump" Closed Circulatory System: blood is contained in vessels and pathways throughout the body. Chambers of Heart Atrium: • the upper 2 chambers of the heart • receives blood from the body and the lungs Ventricles: • the lower 2 chambers of the heart. (larger) • pumps blood to the lungs and body heart diagram,blood vessels and parts Pathways of Blood Blood Vessels Veins: ­carrie blood to the heart ­ contain one­way valves to stop blood from leaking backwards Arteries: ­carrie blood away from the heart. ­these are what you feel when you check for a pulse Capillaries: ­the smallest blood vessel ­the location where nutrients and waste products are exchanged Parts of Blood Plasma: ­liquid part of blood Red Blood Cells: ­carry O2 to the cell ­carry CO2 to the lungs. White Blood Cells: ­fight invaders (diseases and germs) that enter the body (**Osmosis Jones:) Platelets: ­help clot blood ­solid part of your blood